SCREENING ARCHITECTURES ENABLING REVOCATION AND UPDATE
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United States of America Patent
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Jun 9, 2016
app pub date -
Dec 4, 2015
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Dec 4, 2015
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Abstract
Methods, devices, systems and computer program products are provided to facilitate signaling of digital rights management (DRM) information that is carried within a multimedia content as digital watermarks. The embedded watermarks enable signaling of a change in trustworthiness of particular DRM technology, enable addition of new DRM technologies to a trusted list of technologies, and facilitate revocation of obsolete or untrustworthy technologies. Once a content is received at a receiver that is equipped with a watermark extractor, extraction of watermark symbols from the content allows the determination of change in trustworthiness of DRM technologies associated with the content.
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